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| author | Richard Kenner <kenner@gcc.gnu.org> | 1993-10-02 14:06:03 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1993-10-02 14:06:03 -0400 |
| commit | 3771b9b2173ecb10fa517d522755cda6be21403c (patch) | |
| tree | d03e43fa8fd7f966ec32824b96f03ca5851ad3e4 /gcc | |
| parent | 3cd252c3204b88d0f862ce2e2dd9b5ece16a151f (diff) | |
| download | gcc-3771b9b2173ecb10fa517d522755cda6be21403c.zip gcc-3771b9b2173ecb10fa517d522755cda6be21403c.tar.gz gcc-3771b9b2173ecb10fa517d522755cda6be21403c.tar.bz2 | |
(make_decl_rtl): Set TREE_SIDE_EFFECTS on global if -fvolatile-global.
From-SVN: r5559
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/varasm.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/gcc/varasm.c b/gcc/varasm.c index e989a95..e39f546 100644 --- a/gcc/varasm.c +++ b/gcc/varasm.c @@ -468,10 +468,17 @@ make_decl_rtl (decl, asmspec, top_level) DECL_RTL (decl) = gen_rtx (MEM, DECL_MODE (decl), gen_rtx (SYMBOL_REF, Pmode, name)); - if (TREE_THIS_VOLATILE (decl) - || (flag_volatile_global && TREE_CODE (decl) == VAR_DECL - && TREE_PUBLIC (decl))) + + /* If this variable is to be treated as volatile, show its + tree node has side effects. If it has side effects, either + because of this test or from TREE_THIS_VOLATILE also + being set, show the MEM is volatile. */ + if (flag_volatile_global && TREE_CODE (decl) == VAR_DECL + && TREE_PUBLIC (decl)) + TREE_SIDE_EFFECTS (decl) = 1; + if (TREE_SIDE_EFFECTS (decl)) MEM_VOLATILE_P (DECL_RTL (decl)) = 1; + if (TREE_READONLY (decl)) RTX_UNCHANGING_P (DECL_RTL (decl)) = 1; MEM_IN_STRUCT_P (DECL_RTL (decl)) |